Re: add lowpower_idle sysctl

[Pasi Savolainen]

* Andrew Morton <akpm@xxxxxxxx>:
> "Kenneth Chen" <kenneth.w.chen@xxxxxxxxx> wrote:
>>
>> On ia64, we need runtime control to manage CPU power state in the idle
>> loop. 
>
> Can you expand on this?  Does this mean that the admin can select different
> idle-loop algorithms?  If so, what alternative algorithms exist?

At least on 760MPX chipset, when Athlon is pushed into powersaving mode
(disconnected from PCI bus) great deal of graphical distortions are
introduced into bttv -based card's picture.
I've dealt with this by rmmod:ing amd76x_pm -module (this action disables
powersaving mode), but some sane API for disabling these disturbancies
would be much better.


-- 
   Psi -- <http://www.iki.fi/pasi.savolainen>

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